Internet Download Manager 5.11 build 8 features YouTube grabber to download FLV videos from popular sites like YouTube, MySpaceTV, Google Video, etc. When your browser starts playing a video file, IDM grabs its download link. If you like the video, and you would like to save it on your computer, you should open IE context menu by right clicking on the web page that plays the video, and select "Download FLV video content with IDM" menu item. The context menu appears when you right click on a web page (but not on an flv player) in your browser or by using context menu key on the keyboard.
The new release of Internet Download Manager 5.11 build 8 also adds context menu items for downloading FLV videos in Firefox and other Mozilla based browsers. If you don't have this new menu item in Firefox or other Mozilla based browsers, you will need to reinstall idmmzcc.xpi extension. Pick "File->Open File..." menu item in the main menu of your browser and open idmmzcc.xpi file from IDM root folder ("C:Program FilesInternet Download Manager" by default). IDM will start downloading the video and show its standard download dialog. If the server has not specified the file name explicitly, IDM will name the file based on the web page title. You can also edit the filename, add a description, and change its path or category on this dialog.
It's also possible to add FLV extension to IDM list of downloadable file types in IDM "Options->File Types" tab to take over the download of all FLV videos. In this case videos won't be played in your browser. The videos will be downloaded by IDM, saved to your local disk, and can be played if you have an FLV player.
You should have an FLV player (or codec or video converter) installed to play FLV videos.
